Lug-formed vacuum-sealed cap



' v De,c.28,1926.

C. HAMMER LUG FORMED VACUUM SEALED CAP `Filed Oct. 5, 1925 Patented Dec.2%, 1926.

hill@ I tennis CHARLES HAMMER, OF HQLLIS COURT BULEVE, NEWV YORK,ASSIGNR T0 All/IERI- CAN METAL CAP COMPANY, OF BROGKLYN, NEVI YORK, ACORPORATION F NEVI YORK.

LUG-FOBMED VACUUIVI-SEAIJED CAP.

Application lerl October rIhis invention relates to metal caps orclosures having locking lugs or projections for securing the cap on thecontainer, the object of the invention being to provide a lug-formedvacuum seal cap particularly adapted t'or use in the vacuum sealing ofcontainers and which can be quickly and easily released by the user.

In the vacuum sealing ot containers, particularly when packed hot thecap usually used is a friction sealing cap which is secured to thetumbler or container solely by friction, and considerable difficulty iseX- perienced by the user in releasing these caps vfrom the containers.

The object of the present invention, theretore, is the provision oit areadily released lug-formed cap so constructed that it can be used inthe vacuum sealing of containers,

and for this purpose the cap is provided with means which will not onlypermit the escape of theair when the container' is packed hot but willalso enable the cap to be readily released by the user.

In the vacuum sealing of containers it is necessary that the cap bequickly and easily released without the breaking of the glasscontainers. Lug caps, as ordinarily constructed, are not adapted forthis purpose since, as the top and its liner are in engagement with thetop edge or mouth of the container and the skirt is in contact with theglass threads of the container, it follows that if the top is struck orthe skirt is struck to release the cap the force oit the blow isreceived by the glass either on the top mouth edge or on the glassthreads or other cap retaining projections of the container, resultingin the breaking' or chipping oi those portions of the container' whichare likely to get into the contents and therefore make it dangerous touse the same. By forming the cap in the manner shown and describedherein, any pressure on as by the striking of the skirt of the cap dueto the bowed formation thereof whereby it is away from the glass threadsor retaining projections ot the container, prevents the glass containerthreads from receiving the force of the blow and enables the cap skirtto be lengthened and the locking lugs released, and this without anydanger ot injuring the contents of the container.

In the drawings accompanying and :torming part of this specication, Fig.1 is a per- 5, 1925. Serial No. 60,419.

spective view of this improved cap in position on a glass container;Fig. 2 is an enlarged cross sectional View oil this improved cap; Ilig.3 is an inverted view o1 a part of the cap; and Fig. l is a detailenlarged view showing in dotted lines the manner in which the cap isquickly released from the container when used as a vacuum sealing cap.

Similar characters oit reference indicate correspoi'iding parts in theseveral Views. h Before explaining in detail the present improvement andinode of operation thereoit, I desire to have it understood that theinvention is not limited to the details of construction and arrangementlot parts which are illustrated in the accompanying` crawings, since theinvention is capable ot other embodiments, and that the phraseologywhich I employ is tor the purpose of description and not of limitation.

vrlfhis improved lug-termed vacuum seal-V ing cap comprises a top Zand adepending llange or skirt 55 provided at its lower edge with astrengthened or reinforced edge l which'is usually obtained by beading,curlingv or rolling such lower edge. The top of the cap is provided withan annular recess 5 in which is located a suitable ilat ring gasket 5.rlChe skirt of the cap is outwardly bowed as at 6 between its top and.lower edge and this outwardly bowed portion is provided with a seriesoit reinforcements shown in the form of corrugations 7 or similarreinforcing means, which not only permit the escape or air during the.facuum sealing oi" the container but the construction thereorp enables`the cap to be readily released by the user. When the container ispacked the cap with its gasket is placed in position and rotated in oneform thereo so as to bring its locking lugs under the projections orthreads ot the container whereby the container is vacuum-sealed. Greatditticulty however, would be experienced in the release ot suoli cap, infact it would be almost impossible to turn the cap oli" unless meanswere provided for this purpose, and this means in the presentinstanceconsists of the outwardly bowed corrugated skirt, since by pressurethereon as by striking on the same at any point the resilient skirt isthereby lengthened out and the lugs therefore released from the holdingprojections or threads on the container, so that the cap can be easilyturned olf,

The cap is provided with lugs 8 and as shown herein these lugs areformed from the rolled edge of the skirt, and in the form shown twodiametrically opposed lugs are provided and owing to the bowed formationof the skirt itis obvious that the skirt may be pressed or squeezedmidway between the lugs into the dotted line position shown in Fio. 4,thus releasing the lugs from the threads or other form of containerholding means soithat the cap may be quickly and readily removed. Vhenthe container is proi vided with a different form of cap holding meansand the cap is provided with two lugs as shown herein, it maybe bothapplied and removed 7ithout rotating the saine by pressing or squeezingthe skirt owing to the bowed or resilient formation of said skirt sincesuch pressure will act to release the lugs in the manner beforedescribed.

lt is to be understood 'that by describing in: detailherein anyparticular form, structure or arrangement, it is not intended to limitthe invention beyondthe terms of the several claims or thel requirementsof the prior art.

Y Having thus explained the nature of iny said invention andl describedway of conn structing and using tnesame, although with out attempting toset forth all of the forms in which it may be made, or all of thc modesof its use, l claim:

1. A metal cap adapted for use with a container having cap holding meanscoinprising a top having a dependent resilient outwardly bowed andinwardly pre 'ame skirt provided with a pair of diametrically opposedinwardly extending locking lugs, the skirt and lugs being soproportioned with respect to the container holding means as to permitthe cap to be readily released by the distortion of the cap skirt byinward pressure upon the skirt midway of suoli lugs.

2. A metal cap adapted for use with a container having cap holding meansand coinprising a top having a dependent resilien'J outwardly bowed andinwardly pressable skirt having a reinforced lower edge provided with apair of diametrically opposed inwardly extending locking lugs, suchbowed portion terminating in a line with each lug where the lug' joinsthe inner side of lthe skirt, whereby pressure upon the bowed portion ofthe skirt will act directly upon the lugs, the skirt and lugs being soproportioned with respcct to the container holding inea-ns as topermitthe cap to be readily released by the distortion of the cap skirt byinward pressure upon the skirt between said lugs.

A metal cap adapted for use with a container having cap holding meansand comprising a top having a dependent resilient outwardly bowed andinwardly pressable skirt provided with a pair of diametrioally opposedinwardly extending locking lugs lo# cated adjacent to the lower edge ofthe skirt, such bowed portion terminating in a line with each lug wherethe lug joins the inner side of the skirt,y whereby pressure upon thebowed portion of the skirt will act directly upon the lugs, the skirtand lugs being sol proportionsdr with respect to the container holdingmeans as to permit the cap to be radiiy. released by the distortion ofthe cap skirt by inward pressure upon the skirt midway of such lugs.

ri vacuum sealed package comprising a contai having cap retainingprojections thereon, a metal cap comprising a top having gasket and adepending outwardly. bowed resilient reenforced skirt provided with 1 ofdiametrically opposed inwardly eX- ing locking projections locatedadjacent e lower edge of the skirt and adaptedooperate with theretaining projections the container and releasable by inward pressure onthe outwardly bowed portion between the projections to distort the capskirt thereby to lengthen the skirt and release the cooperatingprojections.

5. fr vacuum sealedv package comprising a container having cap retainingprojections, and a rotary metal cap comprising a top having an annularrecess for the reception of a fiat ring gasket and a depending outwardlybowed resilient reinforced skirt terminating in a reinforced orstrengthened lower edge having a pzir of dianietrically opposed inwardlyextending locking projections formed therefrom cooperating with theretaining projections of the container and releasable by pressure on thebowed skirt between the projections to distort the cap skirt thereby tolengthen the saine and release the cooperating holding projections.Signed at Brooklyn, -New York, this 2nd day of QCtober, 1925.

CHARLES HAMMER.

